Update CHANGELOG.md

Author: evgeny-krylov

CHANGELOG.md

@@ -5,8 +5,6 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-### Added
-- Unit tests for services, components, utils
 
 ## [2.3.0] - 2018-06-29
 ### Added